Igneous rock is formed by the cooling of molten rock, either at the surface (lava), or underground (as granite or other similar rocks). The heat of molten rock usually incinerates organisms rather ...

THE closing years of the nineteenth century witnessed a revival of interest in the petrology of gneous rocks, which must be ... product of consolidation of a molten rock-magma; and consideration ...

Igneous rocks close igneous rockIgneous rocks are those which have been formed by the cooling and solidification of molten rock (magma) from underneath the earth’s crust. are formed by magma ...

The Department of Geology has changed its name to the Department of Earth Sciences to better reflect the breath of its work.

It shows the underground plumbing system that provides molten and partly molten rock to the magma chamber beneath the Mount Rainier volcano in Washington state. The scale at left is miles depth.